TM 10-4330-236-13&P1-10. EQUIPMENT DATA.a.WeightandDimensions.Weight, Empty475 poundsLength40.34 inchesWidth77.38 inchesHeight, wheels down54.37 inchesHeight, wheels retracted44.12 inchesb.PerformanceOperating Temperature Range-60°F to +95°FRated Flow200 gpmMaximum Flow300 gpmOperating Pressure50 psigMaximum Pressure150 psigEffluent Fuel Water ContentLess than 5 ppm by volume.Effluent Fuel Solids ContentLess than 1 milligram per liter.c.StorageTemperatureRange-65°F to +145°FSection III. PRINCIPLES OF OPERATION.1-11. SYSTEM TECHNICAL PRINCIPLES OF OPERATION.a.General. The flow of fuel through the filter-separator is shown in figure 1-4. Unfiltered fuel is pressurized by thefuel system pump assembly. The system pump discharge is connected to the filter-separator fuel inlet.b.AirPurging. An air vent valve on top of the tank provides means for releasing trapped air from the tank duringfilling and operation of the filter-separator.c.Over-pressureProtection. The filter-separator is protected from high pressure damage by a pressure relief valveon the top of the tank. This valve opens if tank pressure reaches 150 psig, letting the tank pressure down. Thevalve closes automatically after the internal pressure is let down to a safe value.d.FirstStageFilter.The filter-separator first stage filter consists of 15 replaceable cylindrical elements. Eachelement has a flow capability of 20 gpm. These elements used in parallel provide a conservatively rated flow of200 gpm for the filter separator. Unfiltered fuel flows from the tank inlet, through perforated tubes mounted onan internal wall of the tank, to the inside of the filter elements. The filter elements block solid contaminants, butpass clean fuel out from their external surface. The second function of the filter elements is to coalesceundissolved water droplets in the fuel. These droplets are gathered together by the filter element until largerdrops are formed. Then the water drops, being heavier than the fuel, fall towards the bottom of the tank. Watercollects at the bottom of the tank and is drained from the water sump manually.1-7